松木屑/烟煤粉/PVC粉混合制备成型燃料
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摘要
以松木屑/PVC粉/烟煤粉为原料,在150℃下采用不同压力和不同原料配比混合制备成型燃料,研究不同原料配比和压力对成型后颗粒的初始密度、松弛密度和耐摔强度等物理品质的影响.结果表明,2种或3种原料混合制备成型燃料的稳定性和耐摔强度均高于单一原料.虽然成型燃料的成型密度稳定性和耐摔强度随着压力的增加而升高,但是当压力达到15MPa后,耐摔强度的增加趋势并不是很明显.考虑到热压机能耗随着压力增加而增加的因素,15MPa可以确定为最佳成型压力.15MPa下,成型燃料在混合比例(松木屑:烟煤粉:PVC粉)为1:1:3时密度稳定在1.408g/cm3;耐摔强度在1:1:2时达到最大值99.99%.
The mixtures of pine sawdust/PVC plastic/bitumite were used for producing high physical properties briquettes fuel with stable intensity and high durability, which can make fully use of abandoned pine sawdust, refractory PVC plastic and low quality Qujing bituminous coal. The air dried mixtures of pine sawdust/PVC/bituminous coal were slected to make briquettes fuel under 150 and different pressure. The effects of material ratio and pressure on briquettes initial density, relaxed density and durability ℃were studied. Two or three ingredients of molding fuels had higher density stability and durability than those of single material. The density stability and durability increased with the increase of pressure, but the increasing trend was slow after 15 MPa. Considering that the energy consumption increases with the increase of pressure, 15 MPa could be determined as the best molding pressure. 1.408 g/cm3 was the most stable density of briquettes fuel at 1:1:3, while the durability reached peak value of 99.99% at 1:1:2, under condition of 15 MPa.
The mixtures of pine sawdust/PVC plastic/bitumite were used for producing high physical properties briquettes fuel with stable intensity and high durability, which can make fully use of abandoned pine sawdust, refractory PVC plastic and low quality Qujing bituminous coal. The air dried mixtures of pine sawdust/PVC/bituminous coal were slected to make briquettes fuel under 150 and different pressure. The effects of material ratio and pressure on briquettes initial density, relaxed density and durability ℃were studied. Two or three ingredients of molding fuels had higher density stability and durability than those of single material. The density stability and durability increased with the increase of pressure, but the increasing trend was slow after 15 MPa. Considering that the energy consumption increases with the increase of pressure, 15 MPa could be determined as the best molding pressure. 1.408 g/cm3 was the most stable density of briquettes fuel at 1:1:3, while the durability reached peak value of 99.99% at 1:1:2, under condition of 15 MPa.
引文
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[3]Liu Z,Zhang F,Yan S,et al.Effects of temperature and lowconcentration oxygen on pine wood sawdust briquettes pyrolysis:Gas yields and biochar briquettes physical properties[J].Fuel Processing Technology,2018,177:228-236.
[4]Schwarzb?ck T,Aschenbrenner P,Spacek S,et al.An alternative method to determine the share of fossil carbon in solid refuse-derived fuels-Validation and comparison with three standardized methods[J].Fuel,2018,220:916-930.
[5]Vounatsos P,Atsonios K,Itskos G,et al.Classification of refuse derived fuel(RDF)and model development of a novel thermal utilization concept through air-gasification[J].Waste&Biomass Valorization,2016,7(5):1297-1308.
[6]齐琪,袁京,李赟,等.生活垃圾制备RDF工艺参数及其热特性研究[J].中国环境科学,2017,37(3):1051-1057.Qi Q,Yuan J,Li Y,et al.Processing parameters and thermal characteristics of RDF based on municipal solid waste[J].China Environmental Science,2017,37(3):1051-1057.
[7]Wu Z,Yang W,Li Y,et al.Co-pyrolysis behavior of microalgae biomass and low-quality coal:Products distributions,char-surface morphology,andsynergistic effects[J].Bioresource Technology,2018,255:238.
[8]Gil M V,Casal D,Pevida C,et al.Thermal behaviour and kinetics of coal/biomass blends during co-combustion[J].Bioresource Technology,2010,101(14):5601-5608.
[9]Zellagui S,Sch?nnenbeck C,Zouaoui-Mahzoul N,et al.Pyrolysis of coal and woody biomass under N2,and CO2 atmospheres using a drop tube furnace-experimental study and kinetic modeling[J].Fuel Processing Technology,2016,148:99-109.
[10]Tang L,Fan H,Guo J,et al.Investigation on the mechanism of coal desulfurization by ultrasonic with peroxyacetic acid[J].Energy Sources Part A Recovery Utilization&Environmental Effects,2018,40(8):999-1009.
[11]张辉,胡勤海,滕玮,等.污泥-煤复合燃料的成型干化工艺研究[J].中国环境科学,2013,33(3):486-490.Hui Z,Qin-Hai H U,Wei T,et al.The molding and drying characteristics of sludge-coal combined fuel[J].China Environmental Science,2013,33(3):486-490.
[12]Shen D K,Gu S.The mechanism for thermal decomposition of cellulose and its main products.[J].Bioresource Technology,2009,100(24):6496.
[13]Brebu M,Tamminen T,Spiridon I.Thermal degradation of various lignins by TG-MS/FTIR and Py-GC-MS[J].Journal of Analytical&Applied Pyrolysis,2013,104(11):531-539.
[14]D Mastellone M L,Zaccariello L,Arena U.Co-gasification of coal,plastic waste and wood in a bubbling fluidized bed reactor[J].Fuel,2010,89(10):2991-3000.
[15]Rahaman S A,Salam P A.Characterization of cold densified rice straw briquettes and the potential use of sawdust as binder[J].Fuel Processing Technology,2017,158:9-19.
[16]任珊珊,葛正浩,张正钧.生物质燃料的成型工艺及微观成型机理研究[J].可再生能源,2018,(2):185-194.Shanshan R,Zhenghao G,Zhengjun Z.Study on forming process and microstructure of biomass briquetting[J].Renewable Energy Resources,2018(2):185-194.
[17]He X,Wang D,Kong F,et al.Pelletizing properties of corn stalk rind[J].Journal of Renewable&Sustainable Energy,2016,8(1):13107-13114.
[18]Wu S,Zhang S,Wang C,et al.High-strength charcoal briquette preparation from hydrothermal pretreated biomass wastes[J].Fuel Processing Technology,2018,171:293-300.
[19]Engin G.O,?mürlüN,?ncel M S.Strength and durability characterization of pelletized coal-biomass household briquettes[J].International Journal of Green Energy,2014,13(2):132-137.
[20]Anggono W,Sutrisno,Suprianto F D,et al.Biomass Briquette Investigation from,Pterocarpus Indicus,Leaves Waste as an Alternative Renewable Energy[J].IOP Conference Series Materials Science and Engineering,2017,241.
[21]Peng J,Bi X T,Lim C J,et al.Sawdust as an effective binder for making torrefied pellets[J].Applied Energy,2015,157:491-498.